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Therapeutic cloning and stem cell therapy

Cell biology • Cell division

Key concepts

What you'll likely be quizzed about

  • Embryonic stem cells emerge from very early embryos and can develop into most specialised cell types; they are classified as totipotent or pluripotent depending on their stage.
  • Adult stem cells exist in specific tissues and are multipotent, limiting their differentiation to cell types related to their tissue of origin.
  • Cloning produces organisms or cell populations with identical genes to their source, achieved through artificial methods.

Flashcards

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How does directed differentiation ensure functional cell types?

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It relies on sequential exposure to specific signals that mimic natural development, guiding cells to acquire appropriate structures and functions.

Key notes

Important points to keep in mind

Embryonic stem cells can develop into most specialised types, while adult stem cells are limited.

Therapeutic cloning utilizes a patient's nucleus in an enucleated egg for genetic matching.

Matching genetic profiles minimizes immune rejection risks due to similar MHC proteins.

Directed differentiation requires precise signals and timing for effective results.

Sterile tissue culture conditions are essential for successful cell growth and expansion.

Incomplete differentiation or genetic issues may lead to tumours; consistent safety checks are crucial.

Availability of donor eggs is limited; iPSCs provide another option but come with different risks.

Ethical concerns influence the regulation and accessibility of embryonic stem cell therapies.

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